riscv-port of OpenJDK8?

[Lewis]

Hi Everyone,

I'm looking for the OpenJDK8 port for RISCV, and have found this repository:

https://github.com/openjdk/riscv-port-jdk8u

But when I looked into the hotspot/src/cpu directory, I didn't see the 
riscv directory.

I have a couple of questions:

Is the aforementioned repository usable? What's the status of jdk8 port 
on riscv?

Thanks a lot.

-- 
Sincerely,
Lewis